Abstract
Hamstring muscle strains are one of the most frequent injuries in sports and will result in missed game time by athletes. A sudden and forceful eccentric muscle contraction during the later swing phase of sprinting may directly induce hamstring injury, so does a fast change between eccentric and concentric actions in the foot contact phase. Based on the biomechanical analysis of the hamstring muscle activities during sprinting and the studies focused on hamstring strength training, the purpose of this study is to design a strength training machine specific for hamstring. The activity of hamstring muscles during training simulated the key phase of sprinting in terms of contraction modes and loads. The design principle and usage of the machine, as well as the points for attention, are illustrated in this paper.
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